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Perillo
Couma macrocarpa Barb. Rodr.
APOCYNACEAE
Vacahosca; Perillo Negro; Leche Caspi (Peru); Dukaballi; Cumá assú (Brazil); Cuma Assu (Brazil); Avichuri; Ama Apa (Brazil); Popa; Perillo; Pendare; Palo De Vaca; Melkboom; Vaca Hosca; Sorva; Purva; Nienye; Juan Soco; Guaimaro Macho; Couma; Avichure; Milk Tree; Cow Tree
Couma guatemalensis Standl.; Couma caurensis Pittier; Couma capiron Pittier
It is a large tree, with lengths of 30 to 40 m and up to 100 cm of diameter, with no buttresses. It has abundant creamy latex.
C. macrocarpa grows usually on well drained lowland sites, in the rain forests of tropical America.
It is reported from Guatemala, south to Brazil and Peru.
The latex of this species is used in the manufacture of chewing gum. The fruits are edible.
Wood diffuse porous. Vessels in radial multiples of 2 to 4. Tangential diameter of vessel lumina 150 to 200 micras (medium). Occasionally white deposits in heartwood vessels. Vessels per mm2 6 to 10 (medium). Occasionally vessels per mm2 less than 6. Simple per Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Axial parenchyma in continuous tangential lines (included in reticulate and scalariform). 5 to 8 cells per parenchyma strand. 4 to 10 rays per mm (medium). Rays commonly 2 seriate. Prismatic crystals in radial alignment in procumbent ray cells (chambered cells). Prismatic crystals in the ray cells. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Fibers with distinctly bordered pits.
Unrestricted
Dry wood has no characteristic odor or taste.
The sapwood is not differentiated, the heartwood is reddish yellow when dry.
The grain is reported to be straight or interlocked.
The wood is typically medium in texture.
The wood surface is described as moderate in luster.
The heartwood is susceptible to blue staining fungi.
5
Impregnation of this species is presumably easy.
0.56
0.61
6.4
3.9
1.6
1150
594
84
445
595
This species is interesting for lamination.
This species is interesting for lamination.
Wood processing is reported to be easy.
It is easy to plane, but difficult when interlocked grain is present in the quarter-sawn surfaces.
This species is reported to have a good nailing behavior.
Wood of this species is easy to sand.
Wood of this species gives a good finish, but it may pose some difficulties on quarter sawn stock.
HOUSING GENERAL, beams, joists, flooring, steps, FURNITURE AND CABINETS, PLYWOOD AND VENEER, PACKING, light packing
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